Method for manufacturing one piece turnbuckle
A method for manufacturing a one piece turnbuckle includes preparing a board of metal; deep drawing the board to form two protrusions and shaping the board into a form which has two opposite ends, with the opposite ends defined by the protrusions; deep drawing the board to reduce its thickness and to form a recess; punching the recess off so as to form a through opening; boring a hole through each of the protrusions; and tapping each hole to form a threaded section.
1. Field of the Invention
The present invention relates to a method of manufacture of a turnbuckle and, in particular, to an improved method for manufacturing a one piece turnbuckle.
2. Description of the Related Art
A conventional turnbuckle as appearing in
Referring to EP0,700,748, the turnbuckle manufactured according to the method disclosed has overcome the problem and provided a better tensile strength. However, the manufacture of the turnbuckle is discovered to suffer a certain degree of difficulty relating to the fabrication of end portions.
There is a typical method for manufacturing a one piece turnbuckle that involves hot forging process. However, the forging usually requires expensive tooling and machines. Furthermore, the forging usually requires a bulky starting material, and the metal removal requirement is a necessity. Thus, the turnbuckle is heavy, expensive to manufacture, and material consuming.
The present invention is, therefore, intended to obviate or at least alleviate the problems encountered in the prior art.
SUMMARY OF THE INVENTIONIn accordance with one aspect of the invention, there is provided a method for manufacturing a one piece turnbuckle. The method involves preparing a board of metal. The method further involves deep drawing the board to form two protrusions on a side thereof. By continual deep-drawing the board, the board is shaped into a form of a bar which has two opposite ends defined by the protrusions. The method further involves deep drawing the board to reduce the thickness of the board in a transverse direction and to form a recess between the protrusions. By continual deep-drawing the recess, the depth of the recess is increased. The method further involves punching the recess to form a through opening. The method further involves boring a hole through each of the protrusions. The method further involves tapping each hole to form a threaded section.
It is an objective of the present invention to provide a one piece turnbuckle so that the turnbuckle includes an excellent tensile strength.
It is another objective of the present invention to make the manufacture of a turnbuckle efficient.
It is yet another objective of the present invention to provide a turnbuckle that saves material.
In yet another objective of the present invention to provide a turnbuckle manufactured from a board of metal rather than a bulky one.
Other objectives, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
For the present disclosure to be easily understood and readily practiced, the present disclosure will now be described for the purpose of illustration not limitation, in conjunction with the following figures, wherein:
Referring to
In
In one aspect of the turnbuckle 10 according to the present invention, the turnbuckle 10 is formed in one piece to provide an excellent tensile strength.
In another aspect of the turnbuckle 10 according to the present invention, the turnbuckle 10 is of efficient and economical manufacture, as the turnbuckle 10 is saved from a welding operation.
In yet another aspect of the turnbuckle 10 according to the present invention, the turnbuckle 10 is manufactured from a board of metal rather than a bulky one.
While the specific embodiments have been illustrated and described, numerous modifications come to mind without significantly departing from the spirit of invention and the scope of invention is only limited by the scope of accompanying claims.
Claims
1. A method for manufacturing comprising:
- preparing a board of metal including a first side and a second side opposite to the first side; thereafter
- deep drawing two protrusions from the first side of said board; thereafter
- bending and forming said board into a shape which has two opposite ends defined by the two protrusions; thereafter
- deep drawing said board to form a recess between said protrusions; thereafter
- punching said recess to form a through opening; thereafter
- boring a hole through each of said protrusions; and thereafter
- tapping each hole to form a threaded section, wherein a one piece turnbuckle is formed.
2. A method as claimed in claim 1 when deep drawing the board to form the recess, the thickness of said board is reduced in a transverse direction, and the depth of the recess gradually increases throughout the deep drawing.
3. A method for manufacturing comprising:
- preparing a board of metal including a first side and a second side opposite to the first side; thereafter
- deep drawing two protrusions from the first side of said board; thereafter
- bending and forming said board into a shape which has two opposite ends defined by the two protrusions; thereafter
- boring a hole through each of said protrusions; thereafter
- deep drawing said board to form a recess between said protrusions; thereafter
- punching the recess to form a through opening; and thereafter
- tapping each hole to form a threaded section, wherein a one piece turnbuckle is formed.
4. A method as claimed in claim 3 when deep drawing the board to form the recess, the thickness of said board is reduced in a transverse direction, and the depth of the recess gradually increases throughout the deep drawing.
5. A method for manufacturing comprising:
- preparing a board of metal including a first side and a second side opposite to the first side; thereafter
- deep drawing two protrusions from the first side of said board; thereafter
- bending and forming said board into a shape which has two opposite ends defined by the two protrusions; thereafter
- boring a hole through each of said protrusions; thereafter
- tapping each hole to form a threaded section; thereafter
- deep drawing the board to form a recess between said protrusions; and thereafter
- punching said recess to form a through opening, wherein a one piece turnbuckle is formed.
6. A method as claimed in claim 5 when deep drawing the board to form the recess, the thickness of said board is reduced in a transverse direction, and the depth of the recess gradually increases throughout the deep drawing.
935660 | October 1909 | Johnson |
1413821 | April 1922 | Anderson |
RE27339 | April 1972 | Dornbos |
0700748 | December 1994 | EP |
Type: Grant
Filed: Jun 13, 2007
Date of Patent: Feb 23, 2010
Patent Publication Number: 20080072649
Inventor: Han-Ching Huang (Taichung)
Primary Examiner: Dana Ross
Assistant Examiner: Teresa M Bonk
Attorney: Banger Shia
Application Number: 11/762,215
International Classification: B21D 22/21 (20060101); B21D 28/00 (20060101); B21D 31/00 (20060101); B23P 13/00 (20060101);